Hübner W A, Plas E G, Trigo-Rocha F, Tanagho E A
Department of Urology, University of California School of Medicine, San Francisco.
J Endourol. 1993 Dec;7(6):497-9. doi: 10.1089/end.1993.7.497.
We tested three antireflux double-J stents and compared them with common double-J stents in ex vivo canine urinary systems. At a physiologic flow rate, the drainage function of the antireflux stents proved to be sufficient; however, at a supraphysiological flow rate, drainage was inferior to that of the common double-J stent. Our reflux study demonstrated high-grade reflux with the common double-J stent, which transmitted more than 90% of the bladder pressure to the renal pelvis. The antireflux stents prevented this to a certain degree by both a reduction in and a delay of pressure transmission to the renal pelvis. In preliminary clinical trials, vesicorenal reflux was not detectable radiologically with the antireflux stents.
我们在离体犬泌尿系统中测试了三种抗反流双J支架，并将它们与普通双J支架进行了比较。在生理流速下，抗反流支架的引流功能被证明是足够的；然而，在超生理流速下，其引流效果不如普通双J支架。我们的反流研究表明，普通双J支架会出现高度反流，可将超过90%的膀胱压力传递至肾盂。抗反流支架通过减少并延迟向肾盂的压力传递，在一定程度上防止了这种情况。在初步临床试验中，使用抗反流支架时，影像学检查未发现膀胱输尿管反流。
